LWG3743 ranges::to's reserve may be ill-formed

Author: burblebee

source/ranges.tex

@@ -2338,7 +2338,7 @@
 \begin{codeblock}
 C c(std::forward<Args>(args)...);
 if constexpr (@\libconcept{sized_range}@<R> && @\exposid{reservable-container}@<C>)
-  c.reserve(ranges::size(r));
+  c.reserve(static_cast<range_size_t<C>>(ranges::size(r)));
 ranges::copy(r, @\exposid{container-inserter}@<range_reference_t<R>>(c));
 \end{codeblock}
 \end{itemize}